Automatic stop mechanism for paper-feeding or other machines.



- Patented Nov. 25, |902. G. R. AWlLLIAMS. AUTUNIATIG STOP MEGHANISM FDH PAPER FEEDING 0R GTHEB MACHINES. (Application med 4px. 22, 1901. I `(No Model.)

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No. 714,423. "Patented Nov. 25, |902. s. s. WILLIAMS.

AUTOMTIC STUP MECHvANISM FOR PAPER FEEDING 0R vOTHER MMIHIVNES.V

(Application ledApr. 22, 1901.1

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ji, 17|4,423 f Patented N0v.25, 1902-.

\ e. n. WILLIAMS. 4"AU'IMATIC STUP MECHANISM FOB PAPER `FEEDING 0B OTHER-MACHINES.

(Application sied Apr. 22, 1901.)

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@M7/f N Patented ,Novi 25, |902. v Y

A u G. nl wiLLlAMs.` AUTOMATIC STOP MECHANISM FOR PAPER FEEDING 0R OTHER MACHINES.

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UNITED STATES fATENT OFFICE.

l GEORGE R. WILLIAMS, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE ECONOMIC MACHINE COMPANY, OF `NEW YORK, N. Y.

AUTOMATIC STOP` MECHANISM FOR PAPER-FEEDING R OTHER MACHINES.

SPECIFICATION forming part of Letters Patent No. 714,423, dated November 25, 1902.

` Application filed April 22, 1901. Serial No. 56,936. (No model.)

Be it known that LGEORGE R. WILLIAMS,

. a citizen of the United States, and a resident matic stop mechanisms which are employedv in machines for feeding sheets of paper and in other machines for stopping the machine Whenan abnormal thickness of paper or other material is fed forward. In paper feeding and other machines which operate upon sheets of paper such stop mechanisms are employed forstopping the machine automatically when two or more superposed sheets of paper are accidentally fed forward. Such stop mechanisms usually embody two gage or detector members-a lower one over which the paper moves and an upper one which is arranged at such a height above the lower member that `itis not disturbed by a normal thickness of material, but is moved by an abnormal thickness and then causes the uncoupling of the driving mechanism, thereby stopping the machine. In this class of stop mechanisms the upper movable detector member receives its motion from the moving paper or other material, and such a mechanism is therefore not available when the sheet or other material comes to rest afterit has been started and before it is fed forward, as in the case, for instance, when feeding sheets of paper to a folding-machine. f

My invention has for its main object to produce an efficient and sensitive detector mechanism which is not dependent upon the moving material for its operation, but which is actuated positively and independently of the paper or other material, so thatI the detector is operative when the material is at rest and can bearranged to operate transversely or otherwise with reference to the direction of movement of the material, as may be most convenient. "It is often the case -that the available space between the paper-feeder and the folding or other machine to which the sheets are fed is so narrow that it does not vadmit of a detector mechanism which operates in the direction in which the paper moves. Furthermore, mechanisms of this last-named character require that the abnormal thickness of paper or other material should move through a certain distance in order to operate the movable detector member. This is often objectionable, `for instance, in foldingmachines where two `sheets should be stopped instantly and before they can enter the fold- .ing-machine.

of a folding-machine to which the feedingmachine is coupled. Fig. 4 is a side view of the movable detector member and connecting parts, on an enlarged scale, partly in a section taken in line 4. 4, Fig. l, looking to the right. Fig. 5 is a horizontal section in line 5 5, Fig. 4. Fig. 6 is a longitudinal sectionalview of the rotary detector-head and connecting parts on a still larger scale. Fig. 7 is a front elevation of the same. Fig. 8 is a top plan view, parts being broken away, of the parts containing the locking-bolt. Fig. 9 is an enlarged sectional elevation of the adj ustable support for the movable detector member. pendent arm modified by being provided with an electric contact for operating the stop mechanism. Fig. 11 is a side view of the same. Fig. 12 is a side elevation of the clutch mechanism, showing the parts in the normal driving position. Fig. 13 is a similar view showing the parts in the position in which they are about to' uncouple the driving-pawl. Fig. 14 is a similar view showing the pawl uncoupled. Fig. l5 is a rear end elevation of the clutch mechanism with the gear-Wheel partly in section.

Like letters of reference refer to like parts in the several figures.

Fig. lO is a front elevation of the IOO The drawings illustrate my invention applied between a paper-feeding machine and a folding-machine for detecting two or more superposed sheets which are accidentally fed together from the pile and for stopping the machines before the sheets reach the foldingmachine. The invention is, however, not confined to this particular use, which is simply illustrative of one application of the invention. The paper-feeding machine indicated in the drawings is of the kind in which the sheets are fed o successively from the top of a pile; but the invention may obviously be applied to other styles of machines.

The detector mechanism is mounted upon an upright frame A, which is secured transversely to the front portion of the frame 0f the feeding-machine and extends from one side of the machine inwardly. This frame is conveniently secured at its lower end by legs a to a horizontal bar a', which forms part of the frame of the feeding machine. The frame A consists of a lower horizontal part a2, which is arranged below the path of the paper, and an upper horizontal part a3, which isA arranged above this path. These two horizontal parts of the frame are connected at the side of the machine to an upright portion 0.4.

The lower stationary detector member Bis arranged at the inner end of the lower part co2 of the frame A and is arranged at such a height and position that the sheet which is fed off will pass upon this member and come to rest upon the same.

The upper movable detector member C is so arranged as to move over the lower fixed member transversely to the direction of movement of the sheets. This movable member consists of a finger which has a curved lower face to slide easily over the paper and which is pivoted at its rear end to a rotary head or carrier D by a pivot d. vThis rotary carrier is mounted diametrically at the front end of a shaft e, which is arranged longitudinally in the machine, so that the rotation of the shaft and carrier in the direction of the arrow, Fig. 7, causes the movable detector member to sweep transversely over the underlying sheet. The shaft e is rotated by bevel-gears e' e2 from the inner end of a transverse horizontal shaft e3, which is journaled in the upper part d3 of the frame. The shaft e3 is driven from a horizontal shaftf of the feeding-machine by a chain f' and sprocket-wheels f2 f3 or other suitable mechanism in such manner that the carrier makes one revolution for every sheet which is fed out and causes the movable detector member to sweep over the stationary member after a sheet has been fed upon the same. The shaftfis journaled in the side frames f4 of the feeding-machine in the usual Way and is driven from a constantly-rotating gear-Wheel f5 by a releasable clutch of any suitable kind. The clutch shown for this purpose (onsists of a notched disk g, keyed to the shaftfand having a hub upon which the constantly-rotated gear f5 is mounted. The gear carries a pivoted pawl g', which is thrown into and out of engagement with the notch g2 in said disk by a crab G, to be described, so that by disengaging the pawl from the disk the rotation of the shaft f and the motion of the feeding mechanism actuated thereby are stopped.

The movable detector member C is pivoted to the rear side of the rotary carrier and is curved up on the front and rear sides of the carrier, forming a rear stop c, which limits the downward movement of the front end of this member, and a front stop c', which limits the upward movement thereof. The upward movement which is imparted to the movable member by an abnormal thickness of paper is very slight. This upward movement is transmitted to the short arm h of an elbowlever H, which is arranged diametrically in the face of the carrier. This elbow-lever is connected to the carrier by a pivot h near the movable finger C, so that the short arm h of the elbow-lever projects over the finger. The latter is preferably provided on its upper side with a knife-edge c2, Figs. 6 and 7, by which it engages the short arm h, Which latter is preferably formed by a hardened block secured to the long arm of the lever. The long arm h2 of the lever H is arranged in a groove in the front side of the carrier and extends across the axial line of the shaft e to the diametrically opposite end of the carrier, where the lever H is provided with a rearwardly-projecting head h3.

The lever H is held in its forward position by a spring fi, of any suitable construction. This spring, as shown, is arranged in a socket formed in the frontend of the shaft and bears against the rear side of the lever, holding the latter against a stop-pin i', secured across the groove of the carrier in front of the lever.

In the normal position of the lever its head h3 is retracted and moves in rotating with the carrier past the front side of a depending arm K, by which the uncoupling mechanism is actuated. This arm K is arranged in rear of the rotary carrier, and the parts are so adjusted that in the normal position of the movable detector member C and lever H the head of the latter brushes past the front face of the pendent arm without disturbing the latter. The lower portion of this pendent arm is preferably arc-shaped or segmental, concentric with the axis of the detector-carrier.

When the movable member C encounters an abnormal thickness of paper, it is raised thereby and raises the short arm of the lever H. This slight upward movement is greatly multiplied by the long arm of the lever H and projects the head of the latter rearwardly from the carrier beyond the front side of the depending arm K. The head now strikes against the side of the arm and swings the latter rearwardly on its pivot. This move- IOO IIO

chine.

The lower ends CZ of` the side walls of the rotary carrier D are preferably shaped as.

knife-edges, as shown in Fig. 7, to reduce the contact-surface between the short arm 71, of

the lever and the carrier to a minimum. The `lodgment of paper ber and other solid matter between the short armfof the lever and the carrier is thereby prevented. When the i short arm is fully raised, it rests against these t knife-edges, whereby the pivot of the lever is j .1 relieved of pressure.

`In order to insure the engagement of the head of the lever H with the pendent arm by `a slight projection of the head, .the latter is provided at its rear side with a flaring face h5 Land the arm at the front side with a similarlyat dierent times, the shaft of the rotary carrier is journaled inta vertically-movable support L, Figs. 1,4, 5, and 9, mounted in a vertical gnideZ at the inner end of the upper part of the frame.`

by a Vertical screw Z', engaging with its lower threaded end `in Vsaid support and provided with a bearing-shoulder Z2, which rests upon aplate Z3, secured in the upper face of the upper frame portion. A spring Z4, arranged below the plate Z3, tends to force the support L down and permits the latter to rise if the @detector -nger encounters au obstruction which would strain the parts if the support were rigidly secured. The range of vertical adjustment is so slight that it does not effect the intermeshing of the bevel-wheels.

The pendent shifting arm K is adjustable toward and from the rotary carrier in order to adjust the arm closely to the normal path of the elbow-lever.

. y. is.mounted, as shown in Fig. 4t, upon the neck .1 lof a horizontal adjusting-screw M, which is Forlhis purpose the arm arranged with its threaded portionin a lug m at the upper end of the vertically-movable support L. `The arm is hung loosely upon this neck of the screw and is snugly held U Y i, againsta shoulder at the rear end of the neck by a spring m. t y

The parts by which the movement of the pendent arm is transmitted to the uncoupling mechanism are constructed as follows: The

i `driving-pawl g', `which engages in the notch `6o g2 of the disk g,.and thereby couples the main shaft f to the driving-wheelf5, is thrown into `and out of engagement by the crab G, Figs.

1,2,12 to l5, which is of well-known coni j struction.

The` crab is arranged on the inp ner side of the wheel f5 and sccuredrto a rockf` shaft n, arranged above the shaft f. The

crab has an inner arm g3, provided with a stop This support is adjusted or shoulder g4, an outer arm g5, provided with a stop or shoulder gs, and a tailpiece gl', which strikes against the hub ofthe wheel, and. thereby limits the outward movement of the arms. The driving-pawl g is connected with the wheel f5 by a pivot g8 and connected at its rear end by aslot O and pin O' with a shifting disk O2. The latter is mounted on a pivot 03.011 the inner side of the wheel f5 and provided with inner and outer shifting pins O4 O5, adapted to strike the stop-shoulders of the crab. O6 is a shifting rod which is connected with the shifting disk between these pins by a pin OT, and O8 is a spring applied to said rod between a post O9 on the wheelA and a shoulder O10 on the rod. In the normal driving position of the parts (shown in Fig. 12) the pawl gl is engaged in the notch g2, and the shifting pins Oi O5 pass between the stop-shoulders g4 g6 of the crab as the Wheel f5 rotates. When the crab is tripped for uncoupling the pawl, the arms of the crab are swung outwardly, as shown in Fig. 13, bringing the inner stop-shoulder g4 into the path of the inner shifting pin O4. The latter upon striking this shoulder during the rotation of the wheel f5 is arrested, thereby turning the shifting diskin the direction of the arrow and compressing the spring until the shifting rod O6 has passed the dead-center, when the expansion of the spring completes the movement of the shifting disk to the position shown in Fig. 14, thereby Withdrawing the coupling-pawl g' from the notch g2 of the disk g and stopping the machine. For starting the machine the crab Mis returned to its normal position. (Shown in Fig. 12.) Thisbrings the outer stop-shoulder Q6 of the crab into the path of the outer shifting pin O5 of the disk. This pin upon striking the stop during the rotation of the disk and pawl with the wheel reverses the shifting disk and throws the pawl into engagement with the notched driving-disk g.

P is a forwardly-projecting weighted elbowlever, which is mounted loosely on therockshaft n. ally-projecting pin n', arranged above a forthe downward movement of the lever when released will turn this shaft in such a direction that the crab is shifted to the uncoupling position. (Shown in Fig. 13.) When this takes place, the shifting disk is shifted bythe crab and the driving-pawl is uncoupled, as described.V For holding the crab in the normal position (shown in Fig.12) the lower arm p of the weighted elbow-lever is connected by a rod p with the upper arm of the elbow-lever p2, resting with its lower arm upon a block p3. The latter is connected at its front end by a pivot p5 to a bracket p6 on the upper part a3 of the detector-frame. `This.

block `is held in its elevated position by-a l This leveris provided with alater` IOO -IIO

`I I5 wardly-projecting arm n2 on the shaft, so that i is projected by a spring p9, so that it engages with its outer end in a corresponding open-- ing in the inner side of the pivoted block p3. The locking-pin is connected with the pendent arm K by a rod p10. So long as the pendent arm is in its normal position the Weighted lever is sustained by the locking pin, the block p3, and connecting parts. When the pendent arm is moved by an abnormal thickness of paper, it pulls the pin out of the pivoted block and allows the latter to swing down when otherwise unsupported. This allows the weighted lever P to swing down and causes the pin n on the same to strike the arm n2, secured to the shaft n, depressing said arm and rocking the shaft, so as to place the crab into the uncoupling position, thereby uncoupling the pawl and stopping the machine as soon as the inner pin of the shifting disk in the rotation of the latter with the wheel strikes thecrab and causes the uncouplingpawl to be withdrawn from the notched driving-disk.

The pivoted supporting block or arm p3 is arranged above a cam Q, which is secured to the outer portion of the shaft e3. This arm or block is provided with a roller q, which is adapted to run upon the face of the cam. The latter is provided with a notch q', into which the roller drops when the block is released by the withdrawl of the locking-pin. The face of the cam is provided in front of the notch with a slightly-raised portion q2, Fig. 2. This lifts the roller slightly as the notch approaches the roller and relieves the locking-pin from the weight of the block, the weighted lever, and connecting parts. The pin is so relieved while the detector-finger sweeps over the stationary member, and this permits the easy withdrawal of the pin by the pendent arm if the latter should be actuated by the detector encountering an abnornal thickness of material.

The driving-shaft performs part of a revolution before the clutch is uncoupled, and this is utilized for resetting the detector mechanism before the machine stops. For this purpose the notch q in the cam Q is made so short circumferent-ially that immediately after the weight has been dropped and the rock-shaft n set for uncoupling the roller q of the block p3 is raised out of the notch of the cam upon the face thereof, thereby raising the block p3 until it is again engaged by the locking-pin. This upward movement of the block p3 and connecting parts raises the weighted arm P to its elevated position. The detector mechanism is now set and ready to respond again to an abnormal thickness of material.

The machine having been stopped and the eXtra sheet or other material having been removed, the clutch is again thrown into engagement by the operator. For this purpose any suitable hand mechanism is provided. For instance, the rock-shaft n may be provided with an arm n3 and shipper-rod n for shifting the crab G so as to throw the clutchpawl g into engagement.

The mechanism by which the movement of the pendent arm K uncouples the driving mechanism can be modified in various ways. For instance, as indicated in Figs. 10 and 11, the arm can be provided with a push-pin r and the llug to which it is pivoted with two contacts r' r2, so arranged that the push-pin of the arm makes contact with the yielding contact r2 of the lug and presses the latter against the contact r', thereby closing an electric circuit when the arm is moved out of the normal position by the lever II.- The electric contrivances by which the current is made effective can be constructed as described and shown in Letters Patent No. 567,262, dated September 8, 1896, to B. W. Child, or in any other suitable manner.

The sheets of paper which are fed out by the feeding-machine pass usually upon the leading-in or take roller S of the folding or other machine to which the sheets are fed, and each sheet is propelled forward when the drop-roller S descends and presses the sheet against the lower roller. In the drawings the drop-roller is shown as being supported in arms s, which project farwardly from a rock-shaft s', provided with a rearwardly-projecting arm s2, which is engaged by a rotary cam s3 in a well-known manner, so that the cam alternately raises the roller and allows the same to drop. Often the descent of the drop roller or rollers, of which there may be several, is expedited by a spring.

T is a rock-arm which projects upwardly from the rock-shaft and which is connected by a rod t with a rock-arm t', connected at its lower end to the feeder-frame by a pivot t2. This arm t is rocked back and forth by the connection with the rock-arm T and oscillates in unison with the upward oscillatory movement of the drop-roller.

U is a finger which projects forwardly from the unconpling rock-shaft n of the feedingmachine. This finger is so arranged on this shaft that the free end of the inger stands just above the upper end of the rock-arm t when the shaft "n, stands in the coupling position, as indicated in Fig. 2. In this position ofthe parts the rock-arm oscillates freely underneath the finger U and the descent of the by the downward movement of the weighted lever, the free end of the finger U is swung down into the path of the upper end of the rock-arm t. The latter strikes against the finger,and the drop-roller is thereby held in its elevated position, so that a sheet which may have reached the lower or tape roller is not fed forward. Upon returning the shaft n to the coupling position the finger U is raised out of the way of the rock-arm t', and the operation proceeds as usual.

In my improved detector mechanism the lOO IIO

` which are at rest, and the movement of the finger over the `stationary member can take place at right angles to the direction in which the sheets move, which provides a very compact arrangement of the mechanism between the feeding-machine and the folding or other machine to which the sheets are fed. As the moving detector member or finger sweeps over the stationary member with a rotary movement the finger is in the caliper-ing or detecting position but a moment and frees itself from the paper or other material immediately upon passing out of that position, whereby the contact with the sheets is rendered exceedingly brief and mutilation of the sheets is avoided. The detector-finger is out of the way while the sheet is being fed for- Ward and does not in any way interfere with the sheets and is not liable to be operated by a fold or crumpled portion of a sheet.

When long sheets are fed, it may be desirable to speed the rotation of the` rotary carrier so that it makes two or more revolutions for every sheet in order to detect half-sheets or portions of sheets which are carried on top of a sheet, as is sometimes the case with inferior paper.

I claim as my inventionl. The combination of twodetector members, one of which is capable of being moved out of its normal position by an abnormal `thickness of material between the members,

means for periodically moving one of said members over the surface of said material and into the caliperingposition practically in the direction of such surface, and a stop mechanism which is actuated by said movable member, substantially as set forth.

2. The combination of two detector members, one of which is capable of being moved out of its normal position by an abnormal thickness of material between the members, a movable carrier to which said movable member is attached andwhich moves said movable member periodically over the other member and into the calipering position practically in the direction of the surface of the material, a multiplying-lever which is mounted on said carrier and engaged by said movable member, and a stop mechanism which is actuated by said movable member through said multiplying-lever, substantially as set forth.

3. The combination of two detector members, one of which is capable of being moved and ont of the calipering position, and a stop mechanism which is controlled by said movable member, substantially as set forth.

4. The combination of a detector member, a movable detector-fin ger which is` shifted out of itsnormal position by an abnormal thickness of material, a rotary carrier to which said finger is pivoted, a multiplying-lever arranged on said carrier and engaging said finger, a shifting arm which is engaged by said lever when the finger is moved out of its normal position, and a stop mechanism which is actuated by said shifting arm, substantiallyv as set forth. y

5. The combination of a detector member, a rotary carrier, a detector-finger pivoted to said carrier atone end thereof, a multiplying-lever pivoted to the carrier near said iinger and extending across the center of the carrier to the opposite end thereof, a movable shifting arm which is actuated by the free end of the multiplying-lever, and a stop mechanism which is actuated by said shifting arm, substantially as set forth.

ti. The combination of a detector member,

va rotary carrier, a detector-finger pivoted to said carrier, a multiplying-lever pivoted to said carrier and engaging said finger with its short arm and having its long arm provided with a Haring face, a movable shifting arm provided with a corresponding flaring face, and a stop mechanism which is actuated by said shifting arm, substantially as set forth.

7. The combination of two detector members, one of which is capable of being moved out of its normal position by an. abnormal thickness of material, arotary carrierto which said movable member is attached, a support in which said carrier is journaled and which is adjustable toward and from the opposing member, a multiplyinglever mounted on said carrier and engaging said movable member, a shifting arm which is engaged by said lever when said movable member is moved out of its normal position, and a stop mechanism which is actuated by said shifting arm,

substantially as set forth. y

` 8, The combination of two detector members, one of which is capable of being moved out of its normal position by an abnormal thickness of material,a`rotary carrier to which said movable member is attached, a multiplying-lever mounted on said carrier, a shifting arm which is engaged by said lever when said movable member is moved out of its normal position, means whereby said shifting arm can be adjusted toward and from said multiplyinglever, and a stop mechanism which is actuated by said shifting arm, substantially as set forth.

9. The combination of a stationary detector member, a movable detector-finger, a grooved rotary carrier to which said finger is pivoted, a multiplying-lever arranged in the groove of said carrier,v a spring and stop whereby saidlever is yieldingly held in position, a shiftlOO IIO

ing arm adapted to be actuated by said lever, and a stop mechanism which is actuated by said shifting arm, substantially as set forth.

10. The combination of two detector members, one of which is capable of being moved out of its normal position by an abnormal thickness of material,a rotary carrier to which said movable member is attached, means whereby said carrier is rotated to bring said movable member periodically over the opposing member, a multiplying-lever mounted on said carrier and engagingr said movable member, a shifting arm which is actuated by said multiplying-lever, an uncoupling device for the driving mechanism, and a bolt which holds the uncoupling device in its coupled position and which is connected with said shifting arm and is withdrawn thereby when the movable detector member is moved out of its normal position, substantially as set forth.

ll. The combination of two detector members, one of which is capable of being moved out of its normal position by an abnormal thickness of material,a rotary carrier to which said movable member is attached, a shifting arm which is actuated from said movable member, an uncoupling device for the driving mechanism, a weighted actuating device for said uncoupling device, a movable support for said weighted actuating device, a locking-bolt whereby said support is sustained in its elevated position and which is withdrawn by said shifting arm when said movable member is moved out of its normal position, and a rotary cam which allows said support to drop when released by said bolt and which afterward returns the support to its elevated position, substantially as set forth.

l2. The combination of two detector members, one of which is capable of being moved out of its normal position by an abnormal thickness of material,a rotary carrier to which said movable member is attached, a shifting arm which is actuated from said movable member, an uncoupling device for the driving mechanism, a weighted actuating device for said uncoupling device, a movable support for said weighted actuating device,a locking-bolt whereby said support is sustained in its elevated position and which is withdrawn by said shifting arm when said movable member is moved out of its normal position, and a rotary cam provided with a lifting-face which lifts said support sufficiently to relieve the locking-bolt from the weight in preparing said bolt for withdrawal, substantially as set forth.

13. The combination of two detector members, one of which is capable of being moved out of its normal position by an abnormal thickness of material,a rotarycarrier to which said movable member is attached, a shifting arm which is actuated from said movable member, a rock-shaft connected with the uncoupling` device of the driving mechanism, a weighted lever for moving said shaft to the uncoupling` position, an elbow-lever connected with said weighted lever, a pivoted support for said elbow-lever, and a locking-bolt which sustains said support-in its elevated position and which is connected with said shifting arm and withdrawn thereby for allowing said weighted lever to move said shaft to the uncoupling position, substantially as set forth.

v14. The combination of a rock-shaft which is connected with the uncoupling device of the driving mechanism, a detector mechanism by which said shaft is automatically turned to the uncoupling position, a droproller, an oscillating arm which is connected with the rocking,r support of said roller and moves in unison therewith, and a stop-linger which is secu red to said rock-shaft and which clears said oscillating arm in the coupling position ot' the shaft, allowing the drop-roller to descend, and which projects into the path of said oscillating arm in the uncoupling position of said shaft and prevents the descent of the drop-roller, substantially as set forth.

Witness my hand this 18th day of April,

GEORGE R. WILLIAMS. Witnesses:

GEO. C. KIMBALL, I-I. SCANTLEBURY. 

